drm/i915/cnl: Initialize PLLs

Although CNL follows PLL initialization more like Skylake
than Broxton we have a completely different initialization
sequence and registers used.

One big difference from SKL is that CDCLK PLL is now
exclusive (ADPLL) and for DDIs and MIPI we need to use
DFGPLLs 0, 1 or 2.

v2: Accept all Ander's suggestions and fixes:
    - Registers and bits names prefix
    - Group pll functions
    - bits masks fixes
    - remove read and modify on cfgcr1
    - fix cfgcr0 setup
v3: Set SSC_ENABLE for DP.
    Fix HDMI_MODE cfgcr0.
    Avoid touch cfgcr0 on DP.
    Add missed else on dpll_mgr definition so we use cnl one, not hsw.
v3: Centra freq should be always set to default and change bits
    definitions to (1 << 1) instead of (1<<1). (by Paulo)
v4: Rebased.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Kahola, Mika <mika.kahola@intel.com>
Reviewed-by: Ander Conselvan De Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1497047175-27250-7-git-send-email-rodrigo.vivi@intel.com

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f9e329ada437..9421915cc0f5 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -60,6 +60,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define _MMIO_PORT(port, a, b) _MMIO(_PORT(port, a, b))
 #define _MMIO_PIPE3(pipe, a, b, c) _MMIO(_PICK(pipe, a, b, c))
 #define _MMIO_PORT3(pipe, a, b, c) _MMIO(_PICK(pipe, a, b, c))
+#define _PLL(pll, a, b) ((a) + (pll)*((b)-(a)))
+#define _MMIO_PLL(pll, a, b) _MMIO(_PLL(pll, a, b))
 #define _PHY3(phy, ...) _PICK(phy, __VA_ARGS__)
 #define _MMIO_PHY3(phy, a, b, c) _MMIO(_PHY3(phy, a, b, c))
 
@@ -8143,6 +8145,52 @@ enum {
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port)	((port)*2)
 #define  DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port)	((pll) << ((port)*2))
 
+/* CNL PLL */
+#define DPLL0_ENABLE		0x46010
+#define DPLL1_ENABLE		0x46014
+#define  PLL_ENABLE		(1 << 31)
+#define  PLL_LOCK		(1 << 30)
+#define  PLL_POWER_ENABLE	(1 << 27)
+#define  PLL_POWER_STATE	(1 << 26)
+#define CNL_DPLL_ENABLE(pll)	_MMIO_PLL(pll, DPLL0_ENABLE, DPLL1_ENABLE)
+
+#define _CNL_DPLL0_CFGCR0		0x6C000
+#define _CNL_DPLL1_CFGCR0		0x6C080
+#define  DPLL_CFGCR0_HDMI_MODE		(1 << 30)
+#define  DPLL_CFGCR0_SSC_ENABLE		(1 << 29)
+#define  DPLL_CFGCR0_LINK_RATE_MASK	(0xf << 25)
+#define  DPLL_CFGCR0_LINK_RATE_2700	(0 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_1350	(1 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_810	(2 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_1620	(3 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_1080	(4 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_2160	(5 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_3240	(6 << 25)
+#define  DPLL_CFGCR0_LINK_RATE_4050	(7 << 25)
+#define  DPLL_CFGCR0_DCO_FRACTION_MASK	(0x7fff << 10)
+#define  DPLL_CFGCR0_DCO_FRACTION(x)	((x) << 10)
+#define  DPLL_CFGCR0_DCO_INTEGER_MASK	(0x3ff)
+#define CNL_DPLL_CFGCR0(pll)		_MMIO_PLL(pll, _CNL_DPLL0_CFGCR0, _CNL_DPLL1_CFGCR0)
+
+#define _CNL_DPLL0_CFGCR1		0x6C004
+#define _CNL_DPLL1_CFGCR1		0x6C084
+#define  DPLL_CFGCR1_QDIV_RATIO_MASK	(0xff << 10)
+#define  DPLL_CFGCR1_QDIV_RATIO(x)	((x) << 10)
+#define  DPLL_CFGCR1_QDIV_MODE(x)	((x) << 9)
+#define  DPLL_CFGCR1_KDIV_MASK		(7 << 6)
+#define  DPLL_CFGCR1_KDIV(x)		((x) << 6)
+#define  DPLL_CFGCR1_KDIV_1		(1 << 6)
+#define  DPLL_CFGCR1_KDIV_2		(2 << 6)
+#define  DPLL_CFGCR1_KDIV_4		(4 << 6)
+#define  DPLL_CFGCR1_PDIV_MASK		(0xf << 2)
+#define  DPLL_CFGCR1_PDIV(x)		((x) << 2)
+#define  DPLL_CFGCR1_PDIV_2		(1 << 2)
+#define  DPLL_CFGCR1_PDIV_3		(2 << 2)
+#define  DPLL_CFGCR1_PDIV_5		(4 << 2)
+#define  DPLL_CFGCR1_PDIV_7		(8 << 2)
+#define  DPLL_CFGCR1_CENTRAL_FREQ	(3 << 0)
+#define CNL_DPLL_CFGCR1(pll)		_MMIO_PLL(pll, _CNL_DPLL0_CFGCR1, _CNL_DPLL1_CFGCR1)
+
 /* BXT display engine PLL */
 #define BXT_DE_PLL_CTL			_MMIO(0x6d000)
 #define   BXT_DE_PLL_RATIO(x)		(x)	/* {60,65,100} * 19.2MHz */